% A4 for study: double spacing and a wide outer margin for notes.
\documentclass[11pt,twoside]{article}
\usepackage[a4paper,inner=20mm,outer=70mm,top=22mm,bottom=25mm,
  marginparwidth=14mm,marginparsep=4mm]{geometry}
\input{apology-common}
\linespread{1.9}
\begin{document}
\frontpage
\heading
\input{apology-text}
\end{document}